Message queues and publish-subscribe topics are features of the fully managed enterprise message broker Azure Service Bus (in a namespace). The following advantages are available when using Service Bus to decouple applications and services from one another:
Distributing tasks among rival employees.
Exchanging data and control across service and application boundaries in a secure manner.
Coordinating transactional work that requires a high degree of reliability.
Overview of Microsoft’s Azure Bus Service
Messages are used to move data between various apps and services. A message is a data-filled container that has metadata on it. Any type of information can be used as the data, including structured data stored in popular formats like JSON, XML, Apache Avro, and plain text.